Messages in this thread | | | From | Eric Dumazet <> | Date | Wed, 30 Mar 2022 10:05:12 -0700 | Subject | Re: [PATCH] x86/cpu: use smp_call_function_many() in arch_freq_prepare_all() |
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On Wed, Mar 30, 2022 at 10:02 AM Thomas Gleixner <tglx@linutronix.de> wrote: > > On Wed, Mar 30 2022 at 09:51, Eric Dumazet wrote: > > On Wed, Mar 30, 2022 at 8:58 AM Thomas Gleixner <tglx@linutronix.de> wrote: > >> which I hate with a passion because that allows *unpriviledged* user > >> space to inject systemwide IPIs every 10ms just to read these counters > >> which are providing not more than some estimate and are of no value for > >> the only sane use case of /proc/cpuinfo, i.e. #1 above. > > > > You do realize that before my patch, this is already happening ? > > > > My "optimization" simply replace an open loop of individual IPI with > > use of the broadcast IPI capability. > > > > Are you saying we should remove IPI broadcast and use loops > > of IPI, one cpu at a time ? > > I rather have no IPIs at all...
Can you send an actual patch, with a changelog then ?
I saw kind of a rant about my patch, which was fine IMO.
Sorry.
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